Green and Red Er³⁺ Photoluminescence Behavior in Various Fluoride Glasses

Abstract

Two pure fluoride and three fluoride phosphate glasses with known properties and global structure have been doped with Er 31 (4f 11 ) in a concentration range between 10 19 and 10 21 Er 31 cm À3 . A typical fluorozirconate (ZBLAN) and a typical fluoroaluminate glass (FP00) were compared. The effect of P 2 O 5 addition in fluoroaluminate glasses was investigated with varying phosphate content between 0 and 20 mol% (FPx). Important physical properties were determined to characterize the glass samples. The static and dynamic luminescence behavior of the green ( 4 S 3/2 -4 I 15/2 ) and red ( 4 F 9/2 -4 I 15/2 ) emission have been studied by ultraviolet and visible excitation. The pure fluoroaluminate and fluorozirconate glass samples provide very high green luminescence emission intensity and long lifetime (about 600 ms) due to surrounding fluorine ligands. It is known that adding phosphate to the fluoroaluminate glass increases the glass-forming ability but it decreases the luminescence intensity and lifetime drastically due to more oxygen ligands and higher electron-phonon coupling. The red emission has much lower intensity. Strong luminescence quenching could be found for all types of glass samples with an increasing Er 31 concentration. The glass samples investigated are very useful for applications as special photonic equipments.

Structural Studies of NaPO3–AlF3 Glasses by High-Resolution Double-Resonance Nuclear Magnetic Resonance Spectroscopy

“…They combine the favorable optical properties of fluoride glasses with the higher mechanical and thermal stability of phosphate glasses. Aluminum-containing fluoride phosphate glasses − have attracted considerable attention as matrices for rare-earth dopants for active lasers, amplifier glasses, and for photoluminescence in the visible region. − In addition, nanoparticle-containing systems, inorganic–organic hybrid systems, and biomaterials are being studied . The goal of tailoring the particular properties of these attractive glasses requires a comprehensive understanding of their structural organization.…”

Synthesis and Structural Probing of Eu3+ Doped BaYF5 Nano‐Crystals in Transparent Oxyfluoride Glass‐Ceramics

“…Consequently, the host materials with lower maximum phonon energies are preferred to achieve higher emission efficiencies due to their reduced nonradiative relaxation. Fluoride glasses were the foremost low phonon energy glasses whose cut off phonon energy is approximately 500/cm –1 and exhibiting high optical transparency at mid‐infrared wavelengths together with largely suppressed multiphonon transitions . Fluoride fibers (e.g., ZBLAN optical fiber) are used in different applications, such as spectroscopy and sensing, laser power delivery and fiber lasers and amplifiers for optical communication.…”

“…Fluoride glasses were the foremost low phonon energy glasses whose cut off phonon energy is approximately 500 cm À1 and exhibiting high optical transparency at mid-infrared wavelengths together with largely suppressed multiphonon transitions. 1,2 Fluoride fibers (e.g., ZBLAN optical fiber) are used in different applications, such as spectroscopy and sensing, laser power delivery and fiber lasers and amplifiers for optical communication. However, fluoride glasses suffer from stringent preparation technique together with poor mechanical properties and chemical durability in spite of having high potential.…”